chem101 intro and atomic structure

What best defines an atom?

• the smallest particle that has a unique identity

• particles bonded together through electron transfer

• a cluster of particles with a net charge

• particles bonded together through electron sharing

Look at the 'data points' on the target. Assume the goal is to hit the center of the bull's eye, the data points has high____

• hypothesis

• precision

• accuracy

• rigor

When sodium chloride reactions with silver, sodium nitrate and silver chloride are produced.

11.7g of sodium chloride and 34.0g of silver are reacted, producing 28.7g of silver chloride is produced. How many grams of sodium nitrate is produced?

• 28.7g
• 17.0g

• 51.0g

• 1.5g

Tags

NGSS.HS-PS1-7

How many significant figures are in 0.042g?

How many significant figures are in 50.0?

Write the answer of following calculation to the correct number of significant figures:

6.99 - 5.772 = 1.218

Write the answer of following calculation to the correct number of significant figures:

67.8 * 9.8 = 664.44

How many milliliters are in 2.12 L of water?

1 L = 1000 mL

1 L = 100 cL

1000 L = 1 kL

• 0.00212 mL

• 0.0212 mL

• 212 mL

• 2120 mL

How many neutrons are in 49-Titanium?

Tags

NGSS.HS-PS1-8

The atomic number (Z) represents the number of ____ in an atom.

Select all that apply.

• electrons

• neutrons

• protons

• ions